195 lines
6.5 KiB
Plaintext
195 lines
6.5 KiB
Plaintext
# 2005 November 30
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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#
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# This file contains tests to ensure that the library handles malloc() failures
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# correctly. The emphasis in this file is on sqlite3_column_XXX() APIs.
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#
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# $Id: malloc4.test,v 1.10 2008/02/18 22:24:58 drh Exp $
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#---------------------------------------------------------------------------
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# NOTES ON EXPECTED BEHAVIOUR
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#
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# [193] When a memory allocation failure occurs during sqlite3_column_name(),
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# sqlite3_column_name16(), sqlite3_column_decltype(), or
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# sqlite3_column_decltype16() the function shall return NULL.
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#
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#---------------------------------------------------------------------------
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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source $testdir/malloc_common.tcl
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# Only run these tests if memory debugging is turned on.
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if {!$MEMDEBUG} {
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puts "Skipping malloc4 tests: not compiled with -DSQLITE_MEMDEBUG..."
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finish_test
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return
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}
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ifcapable !utf16 {
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finish_test
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return
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}
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proc do_stmt_test {id sql} {
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set ::sql $sql
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set go 1
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for {set n 0} {$go} {incr n} {
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set testid "malloc4-$id.$n"
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# Prepare the statement
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do_test ${testid}.1 {
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set ::STMT [sqlite3_prepare $::DB $sql -1 TAIL]
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expr [string length $::STMT] > 0
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} {1}
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# Set the Nth malloc() to fail.
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sqlite3_memdebug_fail $n -repeat 0
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# Test malloc failure in the _name(), _name16(), decltype() and
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# decltype16() APIs. Calls that occur after the malloc() failure should
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# return NULL. No error is raised though.
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#
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# ${testid}.2.1 - Call _name()
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# ${testid}.2.2 - Call _name16()
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# ${testid}.2.3 - Call _name()
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# ${testid}.2.4 - Check that the return values of the above three calls are
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# consistent with each other and with the simulated
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# malloc() failures.
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#
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# Because the code that implements the _decltype() and _decltype16() APIs
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# is the same as the _name() and _name16() implementations, we don't worry
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# about explicitly testing them.
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#
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do_test ${testid}.2.1 {
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set mf1 [expr [sqlite3_memdebug_pending] < 0]
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set ::name8 [sqlite3_column_name $::STMT 0]
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set mf2 [expr [sqlite3_memdebug_pending] < 0]
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expr {$mf1 == $mf2 || $::name8 == ""}
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} {1}
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do_test ${testid}.2.2 {
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set mf1 [expr [sqlite3_memdebug_pending] < 0]
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set ::name16 [sqlite3_column_name16 $::STMT 0]
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set ::name16 [encoding convertfrom unicode $::name16]
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set ::name16 [string range $::name16 0 end-1]
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set mf2 [expr [sqlite3_memdebug_pending] < 0]
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expr {$mf1 == $mf2 || $::name16 == ""}
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} {1}
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do_test ${testid}.2.3 {
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set mf1 [expr [sqlite3_memdebug_pending] < 0]
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set ::name8_2 [sqlite3_column_name $::STMT 0]
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set mf2 [expr [sqlite3_memdebug_pending] < 0]
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expr {$mf1 == $mf2 || $::name8_2 == ""}
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} {1}
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set ::mallocFailed [expr [sqlite3_memdebug_pending] < 0]
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do_test ${testid}.2.4 {
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expr {
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$::name8 == $::name8_2 && $::name16 == $::name8 && !$::mallocFailed ||
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$::name8 == $::name8_2 && $::name16 == "" && $::mallocFailed ||
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$::name8 == $::name16 && $::name8_2 == "" && $::mallocFailed ||
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$::name8_2 == $::name16 && $::name8 == "" && $::mallocFailed
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}
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} {1}
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# Step the statement so that we can call _text() and _text16(). Before
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# running sqlite3_step(), make sure that malloc() is not about to fail.
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# Memory allocation failures that occur within sqlite3_step() are tested
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# elsewhere.
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set mf [sqlite3_memdebug_pending]
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sqlite3_memdebug_fail -1
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do_test ${testid}.3 {
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sqlite3_step $::STMT
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} {SQLITE_ROW}
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sqlite3_memdebug_fail $mf
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# Test for malloc() failures within _text() and _text16().
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#
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do_test ${testid}.4.1 {
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set ::text8 [sqlite3_column_text $::STMT 0]
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set mf [expr [sqlite3_memdebug_pending] < 0 && !$::mallocFailed]
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expr {$mf==0 || $::text8 == ""}
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} {1}
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do_test ${testid}.4.2 {
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set ::text16 [sqlite3_column_text16 $::STMT 0]
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set ::text16 [encoding convertfrom unicode $::text16]
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set ::text16 [string range $::text16 0 end-1]
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set mf [expr [sqlite3_memdebug_pending] < 0 && !$::mallocFailed]
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expr {$mf==0 || $::text16 == ""}
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} {1}
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do_test ${testid}.4.3 {
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set ::text8_2 [sqlite3_column_text $::STMT 0]
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set mf [expr [sqlite3_memdebug_pending] < 0 && !$::mallocFailed]
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expr {$mf==0 || $::text8_2 == "" || ($::text16 == "" && $::text8 != "")}
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} {1}
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# Test for malloc() failures within _int(), _int64() and _real(). The only
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# way this can occur is if the string has to be translated from UTF-16 to
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# UTF-8 before being converted to a numeric value.
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do_test ${testid}.4.4.1 {
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set mf [sqlite3_memdebug_pending]
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sqlite3_memdebug_fail -1
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sqlite3_column_text16 $::STMT 0
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sqlite3_memdebug_fail $mf
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sqlite3_column_int $::STMT 0
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} {0}
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do_test ${testid}.4.5 {
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set mf [sqlite3_memdebug_pending]
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sqlite3_memdebug_fail -1
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sqlite3_column_text16 $::STMT 0
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sqlite3_memdebug_fail $mf
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sqlite3_column_int64 $::STMT 0
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} {0}
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do_test ${testid}.4.6 {
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set mf [sqlite3_memdebug_pending]
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sqlite3_memdebug_fail -1
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sqlite3_column_text16 $::STMT 0
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sqlite3_memdebug_fail $mf
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sqlite3_column_double $::STMT 0
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} {0.0}
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set mallocFailedAfterStep [expr \
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[sqlite3_memdebug_pending] < 0 && !$::mallocFailed
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]
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sqlite3_memdebug_fail -1
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# Test that if a malloc() failed the next call to sqlite3_step() returns
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# SQLITE_ERROR. If malloc() did not fail, it should return SQLITE_DONE.
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#
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do_test ${testid}.5 {
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sqlite3_step $::STMT
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} [expr {$mallocFailedAfterStep ? "SQLITE_ERROR" : "SQLITE_DONE"}]
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do_test ${testid}.6 {
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sqlite3_finalize $::STMT
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} [expr {$mallocFailedAfterStep ? "SQLITE_NOMEM" : "SQLITE_OK"}]
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if {$::mallocFailed == 0 && $mallocFailedAfterStep == 0} {
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sqlite3_memdebug_fail -1
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set go 0
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}
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}
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}
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execsql {
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CREATE TABLE tbl(
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the_first_reasonably_long_column_name that_also_has_quite_a_lengthy_type
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);
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INSERT INTO tbl VALUES(
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'An extra long string. Far too long to be stored in NBFS bytes.'
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);
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}
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do_stmt_test 1 "SELECT * FROM tbl"
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sqlite3_memdebug_fail -1
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finish_test
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